DURA™ is manufactured using our clean steel melting technology, which is vacuum degassed and ladle furnace refined before casting. Alloyed with Cr-Ni-Mo and heat-treated to produce a fine Pearlitic / Bainitic structure, DURA™ is offered with different carbon levels and flexible hardness ranges to suit a variety of rolling applications.

 

GRADE DURA™ A DURA™ B DURA™ C DURA™ D DURA™ GT  

 

C: 0.5-1.7%

Ni: 0.5-2.5%

Cr + Mo: <4%

Roughing and  Intermediate
stands for Medium and
Heavy Section Mills,
Rail Mills, Breakdown stands for
Structural Mills, 
Ball Mills
Roughing, Intermediate and
Finishing stands for
Medium and Heavy Section
Mills, Rail Mills,
Breakdown stands for
Structural Mills,
Ball Mills
Roughing, Intermediate and
Finishing stands for
Medium and Heavy Section
Mills, Rail Mills,
Breakdown stands for
Structural Mills
Roughing, Intermediate and
Finishing stands for
Medium and Heavy Section
Mills, Rail Mills
Sleeves and Rings for
Universal stands of
Structural, Medium
and Heavy Section Mills
HSc 35-50 40-50 40-55 50-60 55-65
Tensile Strength MPa 650-740 450-500 450-500 450-500 600-800
Bending Strength MPa 700-1100 508-775 508-775 550-750 600-800
Modulus of Elasticity GPa 200-220 200-220 170-190 170-190 210-220
Microstructure

The hardness adjustment is obtained during a complex heat treatment process.
For production, we need a range of 5 ShC which needs to be specified in the roll order.

Our technical team can help to determine the most suitable grade, degree of hardness and manufacturing method to meet with individual mill conditions and specifications.